# Inverse function

• September 19th 2011, 05:29 PM
benny92000
Inverse function
If f(x) = ln 4x, what is the value of f^-1(6). (The f raises to the -1 is the inverse function of f(x).

$e^{y} = 4x$
$\frac{e^{y}}{4} = x$